Title of article :
Enhanced gas barrier and mechanical properties in organoclay reinforced multi-layer poly(amide-imide) nanocomposite film
Author/Authors :
Yucel، نويسنده , , Orcun and Unsal، نويسنده , , Emre and Harvey، نويسنده , , John and Graham، نويسنده , , Matt and Jones، نويسنده , , Daniel H. and Cakmak، نويسنده , , Miko، نويسنده ,
Issue Information :
دوهفته نامه با شماره پیاپی سال 2014
Pages :
11
From page :
4091
To page :
4101
Abstract :
Multifunctional single and triple-layer films exhibiting flexibility, enhanced modulus and gas barrier properties were developed using a soluble polyamide-imide (PAI) in dimethylacetamide (DMAc) with ammonium-modified montmorillonite (MMT, Cloisite 30B) mineral clay. The drying behavior and associated anisotropy development were determined real-time, using a newly developed real-time measurement system. Out-of-plane birefringence development takes place earlier for thinner neat samples caused primarily by increased depletion rate of solvent. Addition of organoclay content resulted in a decrease in evaporation rate of solvent due to planar orientation of well exfoliated nanoplatelets as shown by TEM images and WAXS. This is in agreement with the out-of-plane anisotropy development observed during drying. Beyond a critical solid wt%, out-of-plane birefringence started to increase earlier with organoclay addition. In the case of multi-layer organoclay reinforced PAI films, the drying behavior of each individual layer was tracked and a complementary drying model is proposed. Planar orientation of nanoplatelets resulted in high helium-barrier properties.
Keywords :
Barrier film , Nanocomposite , Organoclay
Journal title :
Polymer
Serial Year :
2014
Journal title :
Polymer
Record number :
1742301
Link To Document :
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